2 * Fushicai USBTV007 Video Grabber Driver
5 * http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html
7 * Following LWN articles were very useful in construction of this driver:
8 * Video4Linux2 API series: http://lwn.net/Articles/203924/
9 * videobuf2 API explanation: http://lwn.net/Articles/447435/
10 * Thanks go to Jonathan Corbet for providing this quality documentation.
13 * Copyright (c) 2013 Lubomir Rintel
14 * All rights reserved.
15 * No physical hardware was harmed running Windows during the
16 * reverse-engineering activity
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions, and the following disclaimer,
23 * without modification.
24 * 2. The name of the author may not be used to endorse or promote products
25 * derived from this software without specific prior written permission.
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL").
31 #include <linux/init.h>
32 #include <linux/list.h>
33 #include <linux/module.h>
34 #include <linux/slab.h>
35 #include <linux/usb.h>
36 #include <linux/videodev2.h>
38 #include <media/v4l2-device.h>
39 #include <media/v4l2-ioctl.h>
40 #include <media/videobuf2-core.h>
41 #include <media/videobuf2-vmalloc.h>
44 #define USBTV_VIDEO_ENDP 0x81
45 #define USBTV_BASE 0xc000
46 #define USBTV_REQUEST_REG 12
48 /* Number of concurrent isochronous urbs submitted.
49 * Higher numbers was seen to overly saturate the USB bus. */
50 #define USBTV_ISOC_TRANSFERS 16
51 #define USBTV_ISOC_PACKETS 8
53 #define USBTV_CHUNK_SIZE 256
54 #define USBTV_CHUNK 240
57 #define USBTV_MAGIC_OK(chunk) ((be32_to_cpu(chunk[0]) & 0xff000000) \
59 #define USBTV_FRAME_ID(chunk) ((be32_to_cpu(chunk[0]) & 0x00ff0000) >> 16)
60 #define USBTV_ODD(chunk) ((be32_to_cpu(chunk[0]) & 0x0000f000) >> 15)
61 #define USBTV_CHUNK_NO(chunk) (be32_to_cpu(chunk[0]) & 0x00000fff)
63 #define USBTV_TV_STD (V4L2_STD_525_60 | V4L2_STD_PAL)
65 /* parameters for supported TV norms */
66 struct usbtv_norm_params {
68 int cap_width, cap_height;
71 static struct usbtv_norm_params norm_params[] = {
73 .norm = V4L2_STD_525_60,
84 /* A single videobuf2 frame buffer. */
87 struct list_head list;
90 /* Per-device structure. */
93 struct usb_device *udev;
94 struct v4l2_device v4l2_dev;
95 struct video_device vdev;
96 struct vb2_queue vb2q;
97 struct mutex v4l2_lock;
98 struct mutex vb2q_lock;
100 /* List of videobuf2 buffers protected by a lock. */
102 struct list_head bufs;
104 /* Number of currently processed frame, useful find
105 * out when a new one begins. */
110 USBTV_COMPOSITE_INPUT,
117 unsigned int sequence;
118 struct urb *isoc_urbs[USBTV_ISOC_TRANSFERS];
121 static int usbtv_configure_for_norm(struct usbtv *usbtv, v4l2_std_id norm)
124 struct usbtv_norm_params *params = NULL;
126 for (i = 0; i < ARRAY_SIZE(norm_params); i++) {
127 if (norm_params[i].norm & norm) {
128 params = &norm_params[i];
134 usbtv->width = params->cap_width;
135 usbtv->height = params->cap_height;
136 usbtv->n_chunks = usbtv->width * usbtv->height
138 usbtv->norm = params->norm;
145 static int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size)
148 int pipe = usb_rcvctrlpipe(usbtv->udev, 0);
151 for (i = 0; i < size; i++) {
152 u16 index = regs[i][0];
153 u16 value = regs[i][1];
155 ret = usb_control_msg(usbtv->udev, pipe, USBTV_REQUEST_REG,
156 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
157 value, index, NULL, 0, 0);
165 static int usbtv_select_input(struct usbtv *usbtv, int input)
169 static const u16 composite[][2] = {
170 { USBTV_BASE + 0x0105, 0x0060 },
171 { USBTV_BASE + 0x011f, 0x00f2 },
172 { USBTV_BASE + 0x0127, 0x0060 },
173 { USBTV_BASE + 0x00ae, 0x0010 },
174 { USBTV_BASE + 0x0284, 0x00aa },
175 { USBTV_BASE + 0x0239, 0x0060 },
178 static const u16 svideo[][2] = {
179 { USBTV_BASE + 0x0105, 0x0010 },
180 { USBTV_BASE + 0x011f, 0x00ff },
181 { USBTV_BASE + 0x0127, 0x0060 },
182 { USBTV_BASE + 0x00ae, 0x0030 },
183 { USBTV_BASE + 0x0284, 0x0088 },
184 { USBTV_BASE + 0x0239, 0x0060 },
188 case USBTV_COMPOSITE_INPUT:
189 ret = usbtv_set_regs(usbtv, composite, ARRAY_SIZE(composite));
191 case USBTV_SVIDEO_INPUT:
192 ret = usbtv_set_regs(usbtv, svideo, ARRAY_SIZE(svideo));
199 usbtv->input = input;
204 static int usbtv_select_norm(struct usbtv *usbtv, v4l2_std_id norm)
207 static const u16 pal[][2] = {
208 { USBTV_BASE + 0x001a, 0x0068 },
209 { USBTV_BASE + 0x010e, 0x0072 },
210 { USBTV_BASE + 0x010f, 0x00a2 },
211 { USBTV_BASE + 0x0112, 0x00b0 },
212 { USBTV_BASE + 0x0117, 0x0001 },
213 { USBTV_BASE + 0x0118, 0x002c },
214 { USBTV_BASE + 0x012d, 0x0010 },
215 { USBTV_BASE + 0x012f, 0x0020 },
216 { USBTV_BASE + 0x024f, 0x0002 },
217 { USBTV_BASE + 0x0254, 0x0059 },
218 { USBTV_BASE + 0x025a, 0x0016 },
219 { USBTV_BASE + 0x025b, 0x0035 },
220 { USBTV_BASE + 0x0263, 0x0017 },
221 { USBTV_BASE + 0x0266, 0x0016 },
222 { USBTV_BASE + 0x0267, 0x0036 }
225 static const u16 ntsc[][2] = {
226 { USBTV_BASE + 0x001a, 0x0079 },
227 { USBTV_BASE + 0x010e, 0x0068 },
228 { USBTV_BASE + 0x010f, 0x009c },
229 { USBTV_BASE + 0x0112, 0x00f0 },
230 { USBTV_BASE + 0x0117, 0x0000 },
231 { USBTV_BASE + 0x0118, 0x00fc },
232 { USBTV_BASE + 0x012d, 0x0004 },
233 { USBTV_BASE + 0x012f, 0x0008 },
234 { USBTV_BASE + 0x024f, 0x0001 },
235 { USBTV_BASE + 0x0254, 0x005f },
236 { USBTV_BASE + 0x025a, 0x0012 },
237 { USBTV_BASE + 0x025b, 0x0001 },
238 { USBTV_BASE + 0x0263, 0x001c },
239 { USBTV_BASE + 0x0266, 0x0011 },
240 { USBTV_BASE + 0x0267, 0x0005 }
243 ret = usbtv_configure_for_norm(usbtv, norm);
246 if (norm & V4L2_STD_525_60)
247 ret = usbtv_set_regs(usbtv, ntsc, ARRAY_SIZE(ntsc));
248 else if (norm & V4L2_STD_PAL)
249 ret = usbtv_set_regs(usbtv, pal, ARRAY_SIZE(pal));
255 static int usbtv_setup_capture(struct usbtv *usbtv)
258 static const u16 setup[][2] = {
259 /* These seem to enable the device. */
260 { USBTV_BASE + 0x0008, 0x0001 },
261 { USBTV_BASE + 0x01d0, 0x00ff },
262 { USBTV_BASE + 0x01d9, 0x0002 },
264 /* These seem to influence color parameters, such as
265 * brightness, etc. */
266 { USBTV_BASE + 0x0239, 0x0040 },
267 { USBTV_BASE + 0x0240, 0x0000 },
268 { USBTV_BASE + 0x0241, 0x0000 },
269 { USBTV_BASE + 0x0242, 0x0002 },
270 { USBTV_BASE + 0x0243, 0x0080 },
271 { USBTV_BASE + 0x0244, 0x0012 },
272 { USBTV_BASE + 0x0245, 0x0090 },
273 { USBTV_BASE + 0x0246, 0x0000 },
275 { USBTV_BASE + 0x0278, 0x002d },
276 { USBTV_BASE + 0x0279, 0x000a },
277 { USBTV_BASE + 0x027a, 0x0032 },
281 { USBTV_BASE + 0x00ac, 0x00c0 },
282 { USBTV_BASE + 0x00ad, 0x0000 },
283 { USBTV_BASE + 0x00a2, 0x0012 },
284 { USBTV_BASE + 0x00a3, 0x00e0 },
285 { USBTV_BASE + 0x00a4, 0x0028 },
286 { USBTV_BASE + 0x00a5, 0x0082 },
287 { USBTV_BASE + 0x00a7, 0x0080 },
288 { USBTV_BASE + 0x0000, 0x0014 },
289 { USBTV_BASE + 0x0006, 0x0003 },
290 { USBTV_BASE + 0x0090, 0x0099 },
291 { USBTV_BASE + 0x0091, 0x0090 },
292 { USBTV_BASE + 0x0094, 0x0068 },
293 { USBTV_BASE + 0x0095, 0x0070 },
294 { USBTV_BASE + 0x009c, 0x0030 },
295 { USBTV_BASE + 0x009d, 0x00c0 },
296 { USBTV_BASE + 0x009e, 0x00e0 },
297 { USBTV_BASE + 0x0019, 0x0006 },
298 { USBTV_BASE + 0x008c, 0x00ba },
299 { USBTV_BASE + 0x0101, 0x00ff },
300 { USBTV_BASE + 0x010c, 0x00b3 },
301 { USBTV_BASE + 0x01b2, 0x0080 },
302 { USBTV_BASE + 0x01b4, 0x00a0 },
303 { USBTV_BASE + 0x014c, 0x00ff },
304 { USBTV_BASE + 0x014d, 0x00ca },
305 { USBTV_BASE + 0x0113, 0x0053 },
306 { USBTV_BASE + 0x0119, 0x008a },
307 { USBTV_BASE + 0x013c, 0x0003 },
308 { USBTV_BASE + 0x0150, 0x009c },
309 { USBTV_BASE + 0x0151, 0x0071 },
310 { USBTV_BASE + 0x0152, 0x00c6 },
311 { USBTV_BASE + 0x0153, 0x0084 },
312 { USBTV_BASE + 0x0154, 0x00bc },
313 { USBTV_BASE + 0x0155, 0x00a0 },
314 { USBTV_BASE + 0x0156, 0x00a0 },
315 { USBTV_BASE + 0x0157, 0x009c },
316 { USBTV_BASE + 0x0158, 0x001f },
317 { USBTV_BASE + 0x0159, 0x0006 },
318 { USBTV_BASE + 0x015d, 0x0000 },
320 { USBTV_BASE + 0x0284, 0x0088 },
321 { USBTV_BASE + 0x0003, 0x0004 },
322 { USBTV_BASE + 0x0100, 0x00d3 },
323 { USBTV_BASE + 0x0115, 0x0015 },
324 { USBTV_BASE + 0x0220, 0x002e },
325 { USBTV_BASE + 0x0225, 0x0008 },
326 { USBTV_BASE + 0x024e, 0x0002 },
327 { USBTV_BASE + 0x024e, 0x0002 },
328 { USBTV_BASE + 0x024f, 0x0002 },
331 ret = usbtv_set_regs(usbtv, setup, ARRAY_SIZE(setup));
335 ret = usbtv_select_norm(usbtv, usbtv->norm);
339 ret = usbtv_select_input(usbtv, usbtv->input);
346 /* Copy data from chunk into a frame buffer, deinterlacing the data
347 * into every second line. Unfortunately, they don't align nicely into
348 * 720 pixel lines, as the chunk is 240 words long, which is 480 pixels.
349 * Therefore, we break down the chunk into two halves before copyting,
350 * so that we can interleave a line if needed. */
351 static void usbtv_chunk_to_vbuf(u32 *frame, u32 *src, int chunk_no, int odd)
355 for (half = 0; half < 2; half++) {
356 int part_no = chunk_no * 2 + half;
357 int line = part_no / 3;
358 int part_index = (line * 2 + !odd) * 3 + (part_no % 3);
360 u32 *dst = &frame[part_index * USBTV_CHUNK/2];
361 memcpy(dst, src, USBTV_CHUNK/2 * sizeof(*src));
362 src += USBTV_CHUNK/2;
366 /* Called for each 256-byte image chunk.
367 * First word identifies the chunk, followed by 240 words of image
368 * data and padding. */
369 static void usbtv_image_chunk(struct usbtv *usbtv, u32 *chunk)
371 int frame_id, odd, chunk_no;
373 struct usbtv_buf *buf;
376 /* Ignore corrupted lines. */
377 if (!USBTV_MAGIC_OK(chunk))
379 frame_id = USBTV_FRAME_ID(chunk);
380 odd = USBTV_ODD(chunk);
381 chunk_no = USBTV_CHUNK_NO(chunk);
382 if (chunk_no >= usbtv->n_chunks)
385 /* Beginning of a frame. */
387 usbtv->frame_id = frame_id;
388 usbtv->chunks_done = 0;
391 if (usbtv->frame_id != frame_id)
394 spin_lock_irqsave(&usbtv->buflock, flags);
395 if (list_empty(&usbtv->bufs)) {
396 /* No free buffers. Userspace likely too slow. */
397 spin_unlock_irqrestore(&usbtv->buflock, flags);
401 /* First available buffer. */
402 buf = list_first_entry(&usbtv->bufs, struct usbtv_buf, list);
403 frame = vb2_plane_vaddr(&buf->vb, 0);
405 /* Copy the chunk data. */
406 usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd);
407 usbtv->chunks_done++;
409 /* Last chunk in a frame, signalling an end */
410 if (odd && chunk_no == usbtv->n_chunks-1) {
411 int size = vb2_plane_size(&buf->vb, 0);
412 enum vb2_buffer_state state = usbtv->chunks_done ==
417 buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
418 buf->vb.v4l2_buf.sequence = usbtv->sequence++;
419 v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
420 vb2_set_plane_payload(&buf->vb, 0, size);
421 vb2_buffer_done(&buf->vb, state);
422 list_del(&buf->list);
425 spin_unlock_irqrestore(&usbtv->buflock, flags);
428 /* Got image data. Each packet contains a number of 256-word chunks we
429 * compose the image from. */
430 static void usbtv_iso_cb(struct urb *ip)
434 struct usbtv *usbtv = (struct usbtv *)ip->context;
436 switch (ip->status) {
440 /* Device disconnected or capture stopped? */
446 /* Unknown error. Retry. */
448 dev_warn(usbtv->dev, "Bad response for ISO request.\n");
452 for (i = 0; i < ip->number_of_packets; i++) {
453 int size = ip->iso_frame_desc[i].actual_length;
454 unsigned char *data = ip->transfer_buffer +
455 ip->iso_frame_desc[i].offset;
458 for (offset = 0; USBTV_CHUNK_SIZE * offset < size; offset++)
459 usbtv_image_chunk(usbtv,
460 (u32 *)&data[USBTV_CHUNK_SIZE * offset]);
464 ret = usb_submit_urb(ip, GFP_ATOMIC);
466 dev_warn(usbtv->dev, "Could not resubmit ISO URB\n");
469 static struct urb *usbtv_setup_iso_transfer(struct usbtv *usbtv)
472 int size = usbtv->iso_size;
475 ip = usb_alloc_urb(USBTV_ISOC_PACKETS, GFP_KERNEL);
479 ip->dev = usbtv->udev;
481 ip->pipe = usb_rcvisocpipe(usbtv->udev, USBTV_VIDEO_ENDP);
483 ip->transfer_flags = URB_ISO_ASAP;
484 ip->transfer_buffer = kzalloc(size * USBTV_ISOC_PACKETS,
486 ip->complete = usbtv_iso_cb;
487 ip->number_of_packets = USBTV_ISOC_PACKETS;
488 ip->transfer_buffer_length = size * USBTV_ISOC_PACKETS;
489 for (i = 0; i < USBTV_ISOC_PACKETS; i++) {
490 ip->iso_frame_desc[i].offset = size * i;
491 ip->iso_frame_desc[i].length = size;
497 static void usbtv_stop(struct usbtv *usbtv)
502 /* Cancel running transfers. */
503 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) {
504 struct urb *ip = usbtv->isoc_urbs[i];
508 kfree(ip->transfer_buffer);
510 usbtv->isoc_urbs[i] = NULL;
513 /* Return buffers to userspace. */
514 spin_lock_irqsave(&usbtv->buflock, flags);
515 while (!list_empty(&usbtv->bufs)) {
516 struct usbtv_buf *buf = list_first_entry(&usbtv->bufs,
517 struct usbtv_buf, list);
518 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
519 list_del(&buf->list);
521 spin_unlock_irqrestore(&usbtv->buflock, flags);
524 static int usbtv_start(struct usbtv *usbtv)
529 ret = usb_set_interface(usbtv->udev, 0, 0);
533 ret = usbtv_setup_capture(usbtv);
537 ret = usb_set_interface(usbtv->udev, 0, 1);
541 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) {
544 ip = usbtv_setup_iso_transfer(usbtv);
549 usbtv->isoc_urbs[i] = ip;
551 ret = usb_submit_urb(ip, GFP_KERNEL);
563 struct usb_device_id usbtv_id_table[] = {
564 { USB_DEVICE(0x1b71, 0x3002) },
567 MODULE_DEVICE_TABLE(usb, usbtv_id_table);
569 static int usbtv_querycap(struct file *file, void *priv,
570 struct v4l2_capability *cap)
572 struct usbtv *dev = video_drvdata(file);
574 strlcpy(cap->driver, "usbtv", sizeof(cap->driver));
575 strlcpy(cap->card, "usbtv", sizeof(cap->card));
576 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
577 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE;
578 cap->device_caps |= V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
579 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
583 static int usbtv_enum_input(struct file *file, void *priv,
584 struct v4l2_input *i)
586 struct usbtv *dev = video_drvdata(file);
589 case USBTV_COMPOSITE_INPUT:
590 strlcpy(i->name, "Composite", sizeof(i->name));
592 case USBTV_SVIDEO_INPUT:
593 strlcpy(i->name, "S-Video", sizeof(i->name));
599 i->type = V4L2_INPUT_TYPE_CAMERA;
600 i->std = dev->vdev.tvnorms;
604 static int usbtv_enum_fmt_vid_cap(struct file *file, void *priv,
605 struct v4l2_fmtdesc *f)
610 strlcpy(f->description, "16 bpp YUY2, 4:2:2, packed",
611 sizeof(f->description));
612 f->pixelformat = V4L2_PIX_FMT_YUYV;
616 static int usbtv_fmt_vid_cap(struct file *file, void *priv,
617 struct v4l2_format *f)
619 struct usbtv *usbtv = video_drvdata(file);
621 f->fmt.pix.width = usbtv->width;
622 f->fmt.pix.height = usbtv->height;
623 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
624 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
625 f->fmt.pix.bytesperline = usbtv->width * 2;
626 f->fmt.pix.sizeimage = (f->fmt.pix.bytesperline * f->fmt.pix.height);
627 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
632 static int usbtv_g_std(struct file *file, void *priv, v4l2_std_id *norm)
634 struct usbtv *usbtv = video_drvdata(file);
639 static int usbtv_s_std(struct file *file, void *priv, v4l2_std_id norm)
642 struct usbtv *usbtv = video_drvdata(file);
644 if ((norm & V4L2_STD_525_60) || (norm & V4L2_STD_PAL))
645 ret = usbtv_select_norm(usbtv, norm);
650 static int usbtv_g_input(struct file *file, void *priv, unsigned int *i)
652 struct usbtv *usbtv = video_drvdata(file);
657 static int usbtv_s_input(struct file *file, void *priv, unsigned int i)
659 struct usbtv *usbtv = video_drvdata(file);
660 return usbtv_select_input(usbtv, i);
663 struct v4l2_ioctl_ops usbtv_ioctl_ops = {
664 .vidioc_querycap = usbtv_querycap,
665 .vidioc_enum_input = usbtv_enum_input,
666 .vidioc_enum_fmt_vid_cap = usbtv_enum_fmt_vid_cap,
667 .vidioc_g_fmt_vid_cap = usbtv_fmt_vid_cap,
668 .vidioc_try_fmt_vid_cap = usbtv_fmt_vid_cap,
669 .vidioc_s_fmt_vid_cap = usbtv_fmt_vid_cap,
670 .vidioc_g_std = usbtv_g_std,
671 .vidioc_s_std = usbtv_s_std,
672 .vidioc_g_input = usbtv_g_input,
673 .vidioc_s_input = usbtv_s_input,
675 .vidioc_reqbufs = vb2_ioctl_reqbufs,
676 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
677 .vidioc_querybuf = vb2_ioctl_querybuf,
678 .vidioc_create_bufs = vb2_ioctl_create_bufs,
679 .vidioc_qbuf = vb2_ioctl_qbuf,
680 .vidioc_dqbuf = vb2_ioctl_dqbuf,
681 .vidioc_streamon = vb2_ioctl_streamon,
682 .vidioc_streamoff = vb2_ioctl_streamoff,
685 struct v4l2_file_operations usbtv_fops = {
686 .owner = THIS_MODULE,
687 .unlocked_ioctl = video_ioctl2,
688 .mmap = vb2_fop_mmap,
689 .open = v4l2_fh_open,
690 .release = vb2_fop_release,
691 .read = vb2_fop_read,
692 .poll = vb2_fop_poll,
695 static int usbtv_queue_setup(struct vb2_queue *vq,
696 const struct v4l2_format *v4l_fmt, unsigned int *nbuffers,
697 unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
699 struct usbtv *usbtv = vb2_get_drv_priv(vq);
704 sizes[0] = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32);
709 static void usbtv_buf_queue(struct vb2_buffer *vb)
711 struct usbtv *usbtv = vb2_get_drv_priv(vb->vb2_queue);
712 struct usbtv_buf *buf = container_of(vb, struct usbtv_buf, vb);
715 if (usbtv->udev == NULL) {
716 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
720 spin_lock_irqsave(&usbtv->buflock, flags);
721 list_add_tail(&buf->list, &usbtv->bufs);
722 spin_unlock_irqrestore(&usbtv->buflock, flags);
725 static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count)
727 struct usbtv *usbtv = vb2_get_drv_priv(vq);
729 if (usbtv->udev == NULL)
732 return usbtv_start(usbtv);
735 static int usbtv_stop_streaming(struct vb2_queue *vq)
737 struct usbtv *usbtv = vb2_get_drv_priv(vq);
739 if (usbtv->udev == NULL)
746 struct vb2_ops usbtv_vb2_ops = {
747 .queue_setup = usbtv_queue_setup,
748 .buf_queue = usbtv_buf_queue,
749 .start_streaming = usbtv_start_streaming,
750 .stop_streaming = usbtv_stop_streaming,
753 static void usbtv_release(struct v4l2_device *v4l2_dev)
755 struct usbtv *usbtv = container_of(v4l2_dev, struct usbtv, v4l2_dev);
757 v4l2_device_unregister(&usbtv->v4l2_dev);
758 vb2_queue_release(&usbtv->vb2q);
762 static int usbtv_probe(struct usb_interface *intf,
763 const struct usb_device_id *id)
767 struct device *dev = &intf->dev;
770 /* Checks that the device is what we think it is. */
771 if (intf->num_altsetting != 2)
773 if (intf->altsetting[1].desc.bNumEndpoints != 4)
776 /* Packet size is split into 11 bits of base size and count of
777 * extra multiplies of it.*/
778 size = usb_endpoint_maxp(&intf->altsetting[1].endpoint[0].desc);
779 size = (size & 0x07ff) * (((size & 0x1800) >> 11) + 1);
781 /* Device structure */
782 usbtv = kzalloc(sizeof(struct usbtv), GFP_KERNEL);
786 usbtv->udev = usb_get_dev(interface_to_usbdev(intf));
788 usbtv->iso_size = size;
790 (void)usbtv_configure_for_norm(usbtv, V4L2_STD_525_60);
792 spin_lock_init(&usbtv->buflock);
793 mutex_init(&usbtv->v4l2_lock);
794 mutex_init(&usbtv->vb2q_lock);
795 INIT_LIST_HEAD(&usbtv->bufs);
797 /* videobuf2 structure */
798 usbtv->vb2q.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
799 usbtv->vb2q.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
800 usbtv->vb2q.drv_priv = usbtv;
801 usbtv->vb2q.buf_struct_size = sizeof(struct usbtv_buf);
802 usbtv->vb2q.ops = &usbtv_vb2_ops;
803 usbtv->vb2q.mem_ops = &vb2_vmalloc_memops;
804 usbtv->vb2q.timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
805 usbtv->vb2q.lock = &usbtv->vb2q_lock;
806 ret = vb2_queue_init(&usbtv->vb2q);
808 dev_warn(dev, "Could not initialize videobuf2 queue\n");
813 usbtv->v4l2_dev.release = usbtv_release;
814 ret = v4l2_device_register(dev, &usbtv->v4l2_dev);
816 dev_warn(dev, "Could not register v4l2 device\n");
820 usb_set_intfdata(intf, usbtv);
822 /* Video structure */
823 strlcpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name));
824 usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev;
825 usbtv->vdev.release = video_device_release_empty;
826 usbtv->vdev.fops = &usbtv_fops;
827 usbtv->vdev.ioctl_ops = &usbtv_ioctl_ops;
828 usbtv->vdev.tvnorms = USBTV_TV_STD;
829 usbtv->vdev.queue = &usbtv->vb2q;
830 usbtv->vdev.lock = &usbtv->v4l2_lock;
831 set_bit(V4L2_FL_USE_FH_PRIO, &usbtv->vdev.flags);
832 video_set_drvdata(&usbtv->vdev, usbtv);
833 ret = video_register_device(&usbtv->vdev, VFL_TYPE_GRABBER, -1);
835 dev_warn(dev, "Could not register video device\n");
839 dev_info(dev, "Fushicai USBTV007 Video Grabber\n");
843 v4l2_device_unregister(&usbtv->v4l2_dev);
845 vb2_queue_release(&usbtv->vb2q);
852 static void usbtv_disconnect(struct usb_interface *intf)
854 struct usbtv *usbtv = usb_get_intfdata(intf);
856 mutex_lock(&usbtv->vb2q_lock);
857 mutex_lock(&usbtv->v4l2_lock);
860 usb_set_intfdata(intf, NULL);
861 video_unregister_device(&usbtv->vdev);
862 v4l2_device_disconnect(&usbtv->v4l2_dev);
863 usb_put_dev(usbtv->udev);
866 mutex_unlock(&usbtv->v4l2_lock);
867 mutex_unlock(&usbtv->vb2q_lock);
869 v4l2_device_put(&usbtv->v4l2_dev);
872 MODULE_AUTHOR("Lubomir Rintel");
873 MODULE_DESCRIPTION("Fushicai USBTV007 Video Grabber Driver");
874 MODULE_LICENSE("Dual BSD/GPL");
876 struct usb_driver usbtv_usb_driver = {
878 .id_table = usbtv_id_table,
879 .probe = usbtv_probe,
880 .disconnect = usbtv_disconnect,
883 module_usb_driver(usbtv_usb_driver);